"Subway" with daemons, in two parts. (It was originally supposed to be a one-shot, then it doubled. As these things do.)

Part one: Cecil wanders into the newly-formed Night Vale subway...and ends up trapped for several years, away from his boyfriend, his daemon, and his home. Being a radio professional, of course, he documents the whole experience on tape. These are those recordings.

This goes with the big long His Dark Materials AU, but you can probably read it as a standalone, too. Just know that Carlos studies Dust, Khoshekh is Cecil's daemon, and Cecil has weird vision, an alethiometer, and a witch's range.

Title is a play on the Kingston Trio's "M.T.A.", featuring the immortal lyrics "Did he ever return / No, he never returned / And his fate is still unlearned / He may ride forever 'neath the streets of Night Vale Boston / He's the man who never returned...."